Welt guide for sewing machines



y 1930- F. w. MERRICK 1,758,051

WELT GUIDE FOR SEWING MACHINES Filed Nov. 12 1925 Inventor:

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FATEN FHCE FRANK W. MERRICK, F BOSTON, MASSACHUSETTS, ASSIGNOR TO AMERICAN STAY COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS WELT GUIDE FOR Application filed November The drawings show an illustrative embodiment of the principles of the invention.

Fig. 1 is a side elevation of the said embodiment applied in connection with certain of the parts of a curved needle shoe-sewing machine.

Fig. 2 is an oblique view of the said embodiment, including the presser-foot with which the welt-guiding and cutting features are associated, Fig. 2 being on a somewhat larger scale than Fig. 1.

Fig. 3 is a detail view illustrating the features which are more particularly material to the invention, with a representation of portions of a welt and of the materials to which the welt is being attached.

Figs. 4 and 5 are, respectively, an edge view and a plain view, of the cutter-blade which in Figs. 1, 2 and 3 is shown combined with the 29 other parts.

In Figs. 1 and 3 a work-rest partly is shown at 1. In Fig. l at 2, and in Fig. 3 at 2, 21, portions of material, the work so-called, are shown between the work-rest 1 and a presser 3. A curved awl is partly shown at 4 in Fig. 3, and a portion of a curved needle is shown at 5 in Figs. 1 and 3. V

In carrying the invention into efiect I pro vide a welt-passage 6 in, or in connection clined obliquely downward and forward toward the place where the awl and needle play through the work. The welt 7, Fig. 3, enters this passage at the upper end of the latter,

at the top of the presser, and issues from the lower end of the passage, at the under side of the presser, closely adjacent the awl and needle paths. The lowerportion of the passage is open in front so thatthe front edge of the welt is visible in such portion. In virtue of locating the welt-guide above the worksupport and combining the welt-guide with the presser, the welt and its unlon with the work 2, 21, are visible to the operator at the upper surface of the work, which enables hlm to see the end of the welt when it arrives at the surface of the work and reaches the stitchforming devices. With the welt-guide thus located, that surface of the work to which the welt is applied is uppermost, so that in the with, the presser 3, this passage being in SEWING MACHINES 12, 1925. Serial No. 68,552.

process of attaching the welt the said process is carried on in full view of the operator. Therefore, the operator can see the point on the work at which the leading end of the welt has to be attached. Also, the point at which the welt should terminate. Thereby, marking of the work for the guidance of the operator is rendered unnecessary. He is enabled to see plainly where to begin with the attachment of the welt, and where to cut the latter in order that it may terminate at the proper point on the work.

A welt-cutting blade is shown at 8. It is mounted in parallelism with the plane of the work between an extension 31 of the presser and a cap-piece 32 constituted by a side-arm 33 of the presser-frame, such side-arm being attached by means of a screw 34 to the rear portion 35 of the presser-frame, and the said cap-piece being maintained in proper relation to the said extension 3] by means of a screw 36, Figs. 2 and 3. A slot 81, Fig. 5, is formed in the cutter-blade to accommodate the stem of the screw 36 and permit the intended end-play of the cutter-blade to occur. The cutter-blade is formed with a second slot or opening 82, Fig. 5, which registers with the welt-guide passage in the normal retracted position of the cutter-blade, and through which the welt 7 passes, one edge of this slot or opening being formed to cooperate as a cutting edge with one side-wall of the passage 6. For the convenient actuation of the cutterblade, a thumb-lever 9 is pivotally mounted at 91 upon the rear portion of the presserframe, the transmitting arm 92 of such lever being connected pivotally by means of a screw 93 with one end of the cutter-blade. By means of a contracting spring 10, Fig. 2, the thumb-lever is retracted into its normal rest position, shown in Figs. 2 and 3, and

held there until the thumb-lever is moved by the operator to actuate the cutter to cut the welt. In the said rest position of the thumb-lever the cutter-blade occupies a position providing for free movement of the welt through the passage 6. The welt-cutter is actuated to dissever the welt throu h movement manually imparted to the thum lever from left to right in Fig. 2. This movement of the thumb-lever actuates the cutter-blade to move from left to right in a plane parallel with that of the surface of the work; that is to say, to move in the direction contrary to that in which the work is fed by the sewing machine. By reason of the weltpassage of the welt-guide being inclined ob liquely downward and'forward toward the place where the awl and needle play through the work, the path of movement of the cutting-edge of the cutter-blade intersects obliquely the pathway of the welt through the welt-guide, by which a scarfed cut will be produced, giving a better finish to the work than a blunt end produced by a square cut. The cutting will be against the tension of the welt, so that such tension will operate to hold against the action of the cutter the portion of welt at the underside of the latter, and a better and cleaner cutting action will be secured.

What is claimed as the invention is In asewing machine comprising a workrest by which the work operated upon is backed-up to withstand the pressure of a presser-member, and a presser-member by which the work is compressed against the said work-rest, and with the said ressermember provided with a welt-guide, the combination with said work-rest, and said presser-member provided with a welt-guide, of a welt-cutter having a cutting movement in a direction contrary to that in which the work is fed by the sewing machine and intersecting obliquely the pathway through the weltguide, whereby the welt is dissevered by a scarfing cut from one face thereof to the other.

FRANK W. MERRICK. 

